Effects of Key Parameters of Integrated Power System on Vehicle Stability

doi:10.3969/j.issn.1000-1093.2020.09.004

Abstract

Abstract: The instability of the vehicular integrated power system due to its limited volume capacity，more converters and complex working condition is studied. The small signal models of each source and load converter are proposed，from where the output impedance and load input impedance are obtained. The stability criterion of small signal of the vehicular integrated power system is established based on an improved impedance criterion in which the requirements of both the system amplitude and the phase margin are considered. The effects of super-capacitor， filter inductor of DC/DC converter，DC-link capacitor，and speed and torque of driving motor on the system in engine-off operation mode are analyzed by using Bode diagram. Finally，the stability criterion and the theoretical analysis are validated using the simulated results. The methods are used for the evaluation of system stability and the optimization of system design.

Key words: vehicularintegratedpowersystem, small-signalmodel, criterionofimpedanceratio, systemstability

CLC Number:

TJ810.3⁺23

GAO Qiang， LIAO Zili， YUAN Dong， LIU Chunguang. Effects of Key Parameters of Integrated Power System on Vehicle Stability[J]. Acta Armamentarii, 2020, 41(9): 1727-1735.

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